Buggy code:
public static final String CPCONTAINER_INITIALIZER_EXTPOINT_ID = "classpathContainerInitializer" ; public static final String FORMATTER_EXTPOINT_ID = "codeFormatter" ; public static final String COMPILATION_PARTICIPANT_EXTPOINT_ID = "compilationParticipant" ; public static final IPath VARIABLE_INITIALIZATION_IN_PROGRESS = new Path ( "Variable<seq2seq4repair_space>Initialization<seq2seq4repair_space>In<seq2seq4repair_space>Progress" ) ; public static final IClasspathContainer CONTAINER_INITIALIZATION_IN_PROGRESS = new IClasspathContainer ( ) { public IClasspathEntry [ ] getClasspathEntries ( ) { } public String getDescription ( ) { } public int getKind ( ) { } public IPath getPath ( ) { } public String toString ( ) { } } ; private static final String BUFFER_MANAGER_DEBUG = ( JavaCore . PLUGIN_ID ) + "//debug//buffermanager" ; private static final String INDEX_MANAGER_DEBUG = ( JavaCore . PLUGIN_ID ) + "//debug//indexmanager" ; private static final String COMPILER_DEBUG = ( JavaCore . PLUGIN_ID ) + "//debug//compiler" ; private static final String JAVAMODEL_DEBUG = ( JavaCore . PLUGIN_ID ) + "//debug//javamodel" ; private static final String JAVAMODELCACHE_DEBUG = ( JavaCore . PLUGIN_ID ) + "//debug//javamodel//cache" ; private static final String CP_RESOLVE_DEBUG = ( JavaCore . PLUGIN_ID ) + "//debug//cpresolution" ; private static final String ZIP_ACCESS_DEBUG = ( JavaCore . PLUGIN_ID ) + "//debug//zipaccess" ; private static final String DELTA_DEBUG = ( JavaCore . PLUGIN_ID ) + "//debug//javadelta" ; private static final String DELTA_DEBUG_VERBOSE = ( JavaCore . PLUGIN_ID ) + "//debug//javadelta//verbose" ; private static final String HIERARCHY_DEBUG = ( JavaCore . PLUGIN_ID ) + "//debug//hierarchy" ; private static final String POST_ACTION_DEBUG = ( JavaCore . PLUGIN_ID ) + "//debug//postaction" ; private static final String BUILDER_DEBUG = ( JavaCore . PLUGIN_ID ) + "//debug//builder" ; private static final String COMPLETION_DEBUG = ( JavaCore . PLUGIN_ID ) + "//debug//completion" ; private static final String RESOLUTION_DEBUG = ( JavaCore . PLUGIN_ID ) + "//debug//resolution" ; private static final String SELECTION_DEBUG = ( JavaCore . PLUGIN_ID ) + "//debug//selection" ; private static final String SEARCH_DEBUG = ( JavaCore . PLUGIN_ID ) + "//debug//search" ; private static final String SOURCE_MAPPER_DEBUG_VERBOSE = ( JavaCore . PLUGIN_ID ) + "//debug//sourcemapper" ; public static final String COMPLETION_PERF = ( JavaCore . PLUGIN_ID ) + "//perf//completion" ; public static final String SELECTION_PERF = ( JavaCore . PLUGIN_ID ) + "//perf//selection" ; public static final String DELTA_LISTENER_PERF = ( JavaCore . PLUGIN_ID ) + "//perf//javadeltalistener" ; public static final String VARIABLE_INITIALIZER_PERF = ( JavaCore . PLUGIN_ID ) + "//perf//variableinitializer" ; public static final String CONTAINER_INITIALIZER_PERF = ( JavaCore . PLUGIN_ID ) + "//perf//containerinitializer" ; public static final String RECONCILE_PERF = ( JavaCore . PLUGIN_ID ) + "//perf//reconcile" ; private static final String ENABLE_NEW_FORMATTER = ( JavaCore . PLUGIN_ID ) + "//formatter//enable_new" ; private static final String INDEXED_SECONDARY_TYPES = "#@*_indexing<seq2seq4repair_space>secondary<seq2seq4repair_space>cache_*@#" ; public static boolean PERF_VARIABLE_INITIALIZER = false ; public static boolean PERF_CONTAINER_INITIALIZER = false ; public static final ICompilationUnit [ ] NO_WORKING_COPY = new ICompilationUnit [ 0 ] ; HashSet optionNames = new HashSet ( 20 ) ; Hashtable optionsCache ; public final IEclipsePreferences [ ] preferencesLookup = new IEclipsePreferences [ 2 ] ; static final int PREF_INSTANCE = 0 ; static final int PREF_DEFAULT = 1 ; static final Object [ ] [ ] NO_PARTICIPANTS = new Object [ 0 ] [ ] ; public class CompilationParticipants { private final int MAX_SOURCE_LEVEL = 6 ; private Object [ ] [ ] registeredParticipants = null ; public CompilationParticipant [ ] getCompilationParticipants ( IJavaProject project ) { final Object [ ] [ ] participantsPerSource = getRegisteredParticipants ( ) ; if ( participantsPerSource == ( JavaModelManager . NO_PARTICIPANTS ) ) return null ; String sourceLevel = project . getOption ( JavaCore . COMPILER_SOURCE , true ) ; final int sourceLevelIndex = indexForSourceLevel ( sourceLevel ) ; final Object [ ] participants = participantsPerSource [ sourceLevelIndex ] ; int length = participants . length ; CompilationParticipant [ ] result = new CompilationParticipant [ length ] ; int index = 0 ; for ( int i = 0 ; i < length ; i ++ ) { if ( ( participants [ i ] ) instanceof IConfigurationElement ) { final IConfigurationElement configElement = ( ( IConfigurationElement ) ( participants [ i ] ) ) ; final int participantIndex = i ; <START_BUG> Platform . run ( new ISafeRunnable ( ) { <END_BUG> public void handleException ( Throwable exception ) { Util . log ( exception , "Exception<seq2seq4repair_space>occurred<seq2seq4repair_space>while<seq2seq4repair_space>creating<seq2seq4repair_space>compilation<seq2seq4repair_space>participant" ) ; } public void run ( ) throws Exception { Object executableExtension = configElement . createExecutableExtension ( "class" ) ; for ( int j = sourceLevelIndex ; j < ( MAX_SOURCE_LEVEL ) ; j ++ ) participantsPerSource [ j ] [ participantIndex ] = executableExtension ; } } ) ; } CompilationParticipant participant = ( ( CompilationParticipant ) ( participants [ i ] ) ) ; if ( ( participant != null ) && ( participant . isActive ( project ) ) ) result [ ( index ++ ) ] = participant ; } if ( index == 0 ) return null ; if ( index < length ) System . arraycopy ( result , 0 , ( result = new CompilationParticipant [ index ] ) , 0 , index ) ; return result ; } private Object [ ] [ ] getRegisteredParticipants ( ) { } private int indexForSourceLevel ( String sourceLevel ) { } private int sortParticipants ( ArrayList group , IConfigurationElement [ ] configElements , int index ) { } } public final JavaModelManager . CompilationParticipants compilationParticipants = new JavaModelManager . CompilationParticipants ( ) ; public static boolean conflictsWithOutputLocation ( IPath folderPath , JavaProject project ) { } public synchronized IClasspathContainer containerGet ( IJavaProject project , IPath containerPath ) { } private synchronized Map containerClone ( IJavaProject project ) { } private HashSet containerInitializationInProgress ( IJavaProject project ) { } public synchronized void containerPut ( IJavaProject project , IPath containerPath , IClasspathContainer container ) { } public boolean containerPutIfInitializingWithSameEntries ( IPath containerPath , IJavaProject [ ] projects , IClasspathContainer [ ] respectiveContainers ) { } private void containerRemoveInitializationInProgress ( IJavaProject project , IPath containerPath ) { } private synchronized void containersReset ( String [ ] containerIDs ) { }

Fix:
SafeRunner . run ( new ISafeRunnable ( ) {